Articulated locomotive.



C. J. MELLIN.

ARTIGULATED LOCOMOTIVE.

APPLTOATION FILED SEPT. 29, 1910.

Patented Dec. 13, 1910.

2 SHEETS-SHEET-L WITNESSES C. J. MBLLIN. ABTIOULATED LOGOMOTIVE. APPLIGATION nun $32129, 1910.

Patented Dec. 13, 1910.

2 BHEETS-BHEET 2.

INVENTOR WITNE88E8:

been afforded.v

PATENT OFFICE.

' UNITED STATES em .1. mm, or scnnnncrnmr, NEW Yonx.

' A flIGULA IED Looonorrvn Ton-ll whom it may concern:

'Be it known that I, CARL- J. Msnn n, of Schenectady, in the county of Schenectady and'State of New York, have inventeda. certain new and useful Improvement in Articulated Locomotives, of'which improvement the following is a specification.-

My invention, while specially designed for, and relating'more' particularly to, articulated locomotives designed for passenger service, is also adaptable in those of ordinary types, and its object is'to provide means for a more uniform support of the' locomotive upon hearing oints in. front and in rear of the cylinders t an has heretofore The im rovement claimed is hereinafter fully set; orth.

In the accompanyin drawing s Figure 1:

.is'a diagrammatic s1 e vlew'of an =articu-' lated locomotive, illustratingcanannlication rt callongitu dinal, 1 central. section, 01158 11 enlirg'edscale, through the truck'; Fig. a vertical trans verse section through the-truck, apd; Fig. 4, a pa'rtialplan view of the truck. 1 M vention is herein exemplified as applie in alocomotive engine'of the Mallet articulated compound type, comprising a rear frame, 8, supported on a-plurality of driving a wheels, 1, and a front frame, 8*, supported on a plurality of driving wheels, 1, and a four wheeled le'ading truck. 7 The rear frame carrics a pair. of high pressure cylinders, 12,

the pistons of; which are coupled to crank pins on the driving wheels, 1, and the front frame carries a pan of low pressure cylinders, 12, the pistons of which are coupled to crank pins on the driving wheels, 1*. The boiler, 4, is fixed to the rear frame, 8, and the front and rearframesare coupled, in the longitudinal central plane of the locomotive, by a pivot pin, 8, the forward portion of the boiler being thus,as is characteristic in locomotives of this type, free to swing or 'traverse laterally, relatively to thefront frame, 8, in passing curves.

The leading trnckproper may be of any.

- suitable known construction, and is herein shown as comprising side frames, 2", which are supported on two pair of truck wheels, 2, fixed on axles, 2, located in front and in rear, respectively, of the low pressure cylinders, 12, and rotating in axle boxes, 2, fitted, with the capacity of relative vertical movement, in pedestals, 2", secured to the s m n m n; Patented Dec. 13, 1910. Application at; September 29, 1910. Serial no. 5s4,42 2.

side frames. The two side frames are connected, midway between the axles, by a transom casting-2, which is coupled b swinglinks, 2 to a center casting, 2 tted to swivel about the axis ofa vertical center pin, 2, which is fixed at its top, to two abutting saddle members, 125 east integral with the low pressure cylinders, 12 which are fixed to t e front main frame members, 8.

The, overhanging weight of'the forward ortion of. thelocomotive is transmittedrom the front main frame to the truck three point'suspension, with/ a bearing on the forward driving axle, by a lever system, one form of which is herein shown "ta-s of -substantially the following construction. 'Two equalizinglevers, 9, are pivoted by pins, 9, at their forward ends, in advance of the trans\ arse central plane of the truck, to

lugs, 8", depending from the front main frame; members, 8". The levers, 9, are j our-' naled'm" he central transverse plane ot'the' truck, on rollers, 9", fitting in bearing plates, 9, on the top of thecenter casting, 2*,and

frameand axles, and equalized, under .a

are coupled at their rear ends, by links, 9,

to an equalizing lever, 10, located in the longitudinal central plane-of the truck, and pivoted by a pin, -10,'to lugs, 8, on the bottom of a cross brace, 8 ,.which connects the side members of the front main frame.

The rear end of the equalizing lever, 10, is coupled, liy a link, 10,to the middle of a transverse in turn, coupled to the forward'end hangers, 12*, of the springs, 12, of the front driving axle, 1",

It will be seen that under the above described, or any mechanically equivalent construction, the supporting points of the weight of the front portion of the locomotive are located both in front and in rear of the cylinders. and that this weight is equalized with that on the front driving axle,

beam, 11, the ends of which are,

with a three point suspension, there being two bearings on the truck frame and one on the beam connecting the opposite front driving spring hangers. tions of the front equalizing rear equalizing lever, 10, described and shown, are notessential, as, if desired, they may be reversely disposed, that is to say, there may-be a single front and double rear equalizing levers. Further, the fulcrum pin of the rear equalizing lever may be located farther forward, and said lever be extended The relative p'osiv levers, 9, and

nary construction.

toabearin on the center casting of the truck, the ront equalizing levers being in such case dispensed with."

As before stated, iny improvement-is more articularly designed for use in passenger ocomotives of the articulated type, in which,

I claim-as myinvention and desire to S8.- cure by Letters Patent: v 1. In alocomotivengine, the combination of ahmain-frame, cylinders secured thereto, a; four'wheeled leadin truck adapted for swiveling movement re atively to the main frame-,and an equalizing -leversystem the, trucli through points in front j sald equahzin therein and rotat and in rear, respectiveIy,='of the cylinders? 2. In a loco 'otive ,engin 'e, thel'coinbina-v tlon ofjgli main frame, cylinders se ured ders, a four wheeledi eadmgztruck adapted for swivelingimovement "relatively to the. main frame,-Kan equalizing lver'coupled to ame-and. -l e on g ff l r ofv the weightfbnthe equalizing lever is trans mittedto the'drivingwheel axle. i

' 3. In; a locomotive engine, "the combina-. tion- "of, a main "frame, i cylinders secured thereto, a driving: wheel axle journaled therein, afour'wheeledleadin truckadaptforv swivelingmovement re atively to the main frame, an equalizing lever system by which the ,main frame is supported on the truck through bearing points in front and in'rear of thecf'lindergand connections to ever system, through which a portionof t e' weig'hton the main frame is transmitted to the driving wheel axle.

' 4. In'a locomotive engine, the combination of main frame; cylinders secured thereto, a four wheeled leading truck adapted for swiveling movement relatively toothe main frame,- and athree point suspension equalizinglever system by which the main frame is supported throughv bearing points in front and in?" c a 1-', respectively, of the, cylinders.

' 5.; In alocomctive'en "ne,tlie combination of a main frame, cylin ers secured thereto,. afour wheeledfl'eadin 'truck adapted forswiveling movement re atively to the main frame, and auequalizing lever system which a frame, an 3 main frame, in front of thev cylinders, and

6. In a locomotive engine, the combination ofa-maim frame,-; cylinders secured thereto,

a driving wheel axle journaled therein, a

four wheeled leading truck' adapted for swiveling movement relatively to the mam frame, a three point suspension equalizing lever system by which the main frame is supported through bearing points in front and in rear of the cylinders, and connections to said equalizing lever system through which a portion of the weight on the main frame is transmitted .to the driving wheel 7. In a locomotive engine, the combination of a main frame, cylinders secured thereto,

a four wheeled leading truck adapted fors'wiveling movement relatively to the main ualizing lever coupled to the bearing, "in Tear of its connections 'to the main frame on the truck, and a second equalizing lever coupled to the" rear of the first I v specified equalizing-leverand to the main thereto, jxlef'journfllbd fra said cy-liii'f me. A 8;, In-a locomotive en inc, the combination ofta main-frame, cyhnt ers secured thereto, a driving wheel axle journaled therein, a

four wheeled leading truck; adapted for,

'swiveling'movement relatively to the main frame, an -equalizing lever cou led to the main frame in front of the-'"ey inders and bearing in rear ofits connections to the main frame on the truck, a second equaliz- "ing lever cou led to the rear, of the first specified equa izing lever and to the mainframe, and connections to said second ualwei ht on the main frame is transmitted to swiveling movement relatively to the main frame, two equalizing levers'cou led to the main frame in front of the cyllnders and bearing on the truck'on opposite sides of its .center pin, a central equalizing .le\-'(-.r

coupledto the-rear ends of sa1d:two e ualizinglevers and bearing on the main ramc, and a. transverse beam coupled centrally to the'rcar end o'f'said central equalizing lever and-coupled, at its ends, to the spring ha 11;;-

ers of the driving wheel axle. -11 v I CAR-L J. MELLIN.

Witnesses:

"CHAS, J. Roefins,

FRANK H. SAt'ITEB. 

